Bummer. Are they worth it? You could try to buy a flattener used and sell it used (and hope you don't break it in the meantime).

What sort of turntable do you own?

lay them flat (still in their covers), put some plywood on top, and weight them down with barbell plates, lots of books, sandbags, whatever. Leave them for a week. Save $1900.

Hope that suggstion works. I've heard (read) of one long ago that uses the oven at low temperature (don't remember what the setting was), and uses two flat plates in which the LP is placed. Care must be exercised not to go too high in temperature.

You can experiment with a high quality record clamp which would also provide better sound for all of your LP's. A good clamp will flatten any slight defect in a disc. Anything a clamp can't flatten, you won't be able to do anything with anyway. There are limits to what can be reshaped no matter the method you use.

Jan - well, you can heat it near to the point of melting and shape it into darn near anything you want . Of course, it won't sound very good and may break your cartridge. But it'll be flat!

Uh, ... yep, yep, you can do that!!!!!!????